@import url(https://cdn.bootcss.com/normalize/7.0.0/normalize.min.css);
@import url(./font.css);

body {
    background-color: #f1f1f1;
}
main {
    position: relative;
    max-width: 380px;
    max-height: 640px;
    margin: 0 auto;
    margin-top: 40px;
    padding: 10px;
    border-radius: 4px;
    background-color: #fefefe;
    box-shadow: 0 2px 3px 1px rgba(38, 50, 56, 0.16);
}
.box {
    margin-bottom: 20px;
}
.box > ul {
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    margin: 0;
    margin-bottom: 10px;
}
.box > ul > li {
    float: left;
    min-height: 120px;
    width: 120px;
    list-style: none;
    border-radius: 4px;
    background-color: #90A4AE;
    -webkit-transition: transform 0.2s ease-out, background-color 0.2s ease-in-out;
    -moz-transition: transform 0.2s ease-out, background-color 0.2s ease-in-out;
    transition: transform 0.2s ease-out, background-color 0.2s ease-in-out;
}
.box > ul > li:hover {
    -webkit-transform: scale(1.2);
    -moz-transform: scale(1.2);
    -ms-transform: scale(1.2);
    -o-transform: scale(1.2);
    transform: scale(1.2);
}
button {
    -webkit-transition: all 0.2s ease-in;
    -moz-transition: all 0.2s ease-in;
    transition: all 0.2s ease-in;
    outline-style: none;
}
button:hover {
    background-color: #E91E63;
    color: #CFD8DC;
}
button:active {
    color: #fff;
    -webkit-transform: scale(1.05);
    -moz-transform: scale(1.05);
    -ms-transform: scale(1.05);
    -o-transform: scale(1.05);
    transform: scale(1.05);
}
.start-btn,
.end-btn {
    width: 100%;
    height: 50px;
    background-color: #2196F3;
    color: #f1f1f1;
    border: 0;
    border-radius: 4px;
    margin-top: 10px;
}
.end-btn {
    background-color: #F44336;
}
